<template>
  <el-container class="home-container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/ayong.jpg" alt="" /><span>电商管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button></el-header
    >
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse? '64px' : '200px'" class="aside-transition">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition='false'
          :router='true'
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="String(item.id)"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <!-- 子路由占位符 -->
        <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      //   左侧菜单数据
      menulist: [],
      iconObj: {
        125: "iconfont icon-users",
        103: "iconfont icon-lock_fill",
        101: "iconfont icon-tijikongjian",
        102: "iconfont icon-danju",
        145: "iconfont icon-baobiao",
      },
      isCollapse: false,
      //被激活的链接地址
      activePath: ''
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem('activePath');
  },
  methods: {
    //点击退出，清空token，重定向到登录页
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //点击按钮切换折叠展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 获取左侧菜单数据
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.message);
      this.menulist = res.data;
      console.log(res);
    },
    //保存激活链接的状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath);
      this.activePath = activePath;
    }
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  background-color: #373d41;
  color: #fff;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    img {
      display: block;
      width: 61px;
      height: 56px;
    }
    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu {
      border-right: 0;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}

.aside-transition {
    transition: all .5s 0s;
}
</style>